Aw, this is such a beautiful little story. It made me think, it made me feel... it made me desperately want to go and spend some quality time in nature. (It's too late to say hello to winter, but spring at least is here—for now!)
I would love to see more of these characters and this world. I think this concept is an excellent setup for a branching narrative—maybe even one where the player gets to pick their season, how they spend their time managing it, and finally, how they spend their final days.
But I loved this particular Spring and Winter, and their relationship, too. So even if this is all we get of this world, you should absolutely be proud of what you've made here. :)
(PS: I've actually featured this game in my annual NaNoRenO spotlight post this year—here's the link if you'd like to check it out!)